MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 591f1f8b00c0eb6b24da2646904aabaf9ee6e6dcc735cf533bb4c1ccdf9e1f60. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


Formbook


Vendor detections: 13


Intelligence 13 IOCs YARA 4 File information Comments
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SHA256 hash: 591f1f8b00c0eb6b24da2646904aabaf9ee6e6dcc735cf533bb4c1ccdf9e1f60
SHA3-384 hash: 8d4e1c0fd9007be3feb864efc5e47fd24de13715e9b6bafa7da4be9ac3f9290f2f22be4e7a6203b042827e955aa28a88
SHA1 hash: 069192be97a40af2ba5d6ecce4c52e40686e161d
MD5 hash: 16bd3a8146065eeebb8550d754624543
humanhash: montana-equal-connecticut-romeo
File name:16bd3a8146065eeebb8550d754624543.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:469'504 bytes
First seen:2021-10-05 17:19:28 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'741 x AgentTesla, 19'606 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:rSocc0W8P9dBhvSKrrWo17qBja570Jza:rSrc0W4dLrH7q+0J
Threatray 9'953 similar samples on MalwareBazaar
TLSH T114A4CF9433AF6F45ED349FF5141C91D157BABC3B2469D3290ED6B0EA2D32BB00A90A53
Reporter abuse_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
353
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
10-05-2021.xlsx
Verdict:
Malicious activity
Analysis date:
2021-10-05 15:56:18 UTC
Tags:
encrypted opendir exploit CVE-2017-11882 loader trojan formbook stealer
Link:
https://app.any.run/tasks/4f0f52c4-bc25-46e2-bb61-251ed630aa27

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/195151/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.935-1.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Launching a process
Creating a file in the %temp% directory
Delayed writing of the file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/615c8947b95458900cdc9067/reports/8c5d7ba9-c9c9-4238-828f-2ad402b4cfaf/overview
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/3dacc971-d792-4271-afaf-6d2cb671137c
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/865005
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found malware configuration
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 497433 Sample: VmbABLKNbD.exe Startdate: 05/10/2021 Architecture: WINDOWS Score: 100 29 www.juxing666.com 2->29 47 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->47 49 Found malware configuration 2->49 51 Malicious sample detected (through community Yara rule) 2->51 53 6 other signatures 2->53 10 VmbABLKNbD.exe 3 2->10         started        signatures3 process4 file5 27 C:\Users\user\AppData\...\VmbABLKNbD.exe.log, ASCII 10->27 dropped 55 Tries to detect virtualization through RDTSC time measurements 10->55 57 Injects a PE file into a foreign processes 10->57 14 VmbABLKNbD.exe 10->14         started        signatures6 process7 signatures8 59 Modifies the context of a thread in another process (thread injection) 14->59 61 Maps a DLL or memory area into another process 14->61 63 Sample uses process hollowing technique 14->63 65 Queues an APC in another process (thread injection) 14->65 17 wlanext.exe 14->17         started        20 explorer.exe 14->20 injected process9 dnsIp10 37 Self deletion via cmd delete 17->37 39 Modifies the context of a thread in another process (thread injection) 17->39 41 Maps a DLL or memory area into another process 17->41 43 Tries to detect virtualization through RDTSC time measurements 17->43 23 cmd.exe 1 17->23         started        31 factechcolombia.com 81.88.48.71, 49792, 80 REGISTER-ASIT Italy 20->31 33 www.giftsetswithlove.com 74.208.236.108, 49786, 80 ONEANDONE-ASBrauerstrasse48DE United States 20->33 35 4 other IPs or domains 20->35 45 System process connects to network (likely due to code injection or exploit) 20->45 signatures11 process12 process13 25 conhost.exe 23->25         started       
Detection:
xloader
Create hunting rule
Link:
https://mwdb.cert.pl/sample/591f1f8b00c0eb6b24da2646904aabaf9ee6e6dcc735cf533bb4c1ccdf9e1f60/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-10-05 15:44:37 UTC
AV detection:
14 of 28 (50.00%)
Threat level:
  5/5
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
18f25a6941b39471ea68715f7ab4b3f96990808ded5138054b96763179e0c19e
Formbook
2728dc98fdebc00823b877eba49ace782c17db8a07074634aafca9dc00277776
Formbook
378ee60fb2d81639f413f10e21dbb12a052d37fd5e1c56bc160e9a9ad7351e89
Formbook
4633bc441c059884886be83a8733f355d933b58db80f81c0a56404bceadf9667
Formbook
5852e0b1479d914e16a2f1cf21d61ff4e1f3d35b6fa5dbcf0055cfc2c9a89936
Formbook
5c8f31380d956958134331ea55e63835fd16ca1f02f4c81672b69db70bc97ab8
Formbook
758acf61b0f5ffe96a2ea2b6a946e32699e0e326fcc4f58596addb7c1784115c
Formbook
c18d5baf727358a8635a51fc7cfb4c3f4c90c78abcecf051feb4540323e98746
Formbook
c4c9d27ea805c32e7f0e66dc0d9534d8fbd87f4c1327727b2e1e9ae937f02c45
Formbook
c6ac9c7f14e2fe9196fe5fdd2a30236a157d4c04c0e5c9dc84e8592984756717
Formbook
+ 9'943 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:shjn loader rat
Link:
https://tria.ge/reports/211005-vwe3waaeaq/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Xloader Payload
Xloader
Malware Config
C2 Extraction:
http://www.anamentor.com/shjn/
Unpacked files
SH256 hash:
b25dbf764b25a981f832938b6009d9a5652a61514e6781894fe2349b8057096a
MD5 hash:
8eb4e927a9446627f66a5ca01c6b7e5f
SHA1 hash:
b2296998b3d6bc3346481f808e069c37566e5a0f
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/3e65236e-4598-44f3-bb86-ca8f4f3c9c4d/
Parent samples :
4633bc441c059884886be83a8733f355d933b58db80f81c0a56404bceadf9667
591f1f8b00c0eb6b24da2646904aabaf9ee6e6dcc735cf533bb4c1ccdf9e1f60
f0537b93c3ac221e4efe9d5835845b4930529890472272b0b0f8db2bf1d4ca5b
9fd253b8d45e4204580e7277bb43bdf115b796a722ecc7afc20cad8c75dc3d60
862d9ecd31b3ad9fbdaf4f5c25e2bf5e4abbbb0a922e097a0c0dd69c8acb6ae3
SH256 hash:
fe8637d821a39a8b74abce7e043007d38cb9c5cfcb7098af9846cfd98185ac03
MD5 hash:
c380b6831f456ac5cac08c78c0e4dada
SHA1 hash:
3e241a0b9d96c1dfbadd7ee1a8c5ee6d74eba11c
Link:
https://www.unpac.me/results/3e65236e-4598-44f3-bb86-ca8f4f3c9c4d/
SH256 hash:
436e6c2ed728b863b955f313fd8dd9e184e6e782f3d384aaf2ef5ce48e657621
MD5 hash:
5639d9bea42bc7c68142c4a07d093b06
SHA1 hash:
17a011c5545b5d1b896a88b41ed61de7742c70e5
Link:
https://www.unpac.me/results/3e65236e-4598-44f3-bb86-ca8f4f3c9c4d/
SH256 hash:
591f1f8b00c0eb6b24da2646904aabaf9ee6e6dcc735cf533bb4c1ccdf9e1f60
MD5 hash:
16bd3a8146065eeebb8550d754624543
SHA1 hash:
069192be97a40af2ba5d6ecce4c52e40686e161d
Link:
https://www.unpac.me/results/3e65236e-4598-44f3-bb86-ca8f4f3c9c4d/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.65
Link:
https://yomi.yoroi.company/submissions/591f1f8b00c0eb6b24da2646904aabaf9ee6e6dcc735cf533bb4c1ccdf9e1f60

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:pe_imphash
Create hunting rule
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

Formbook

Executable exe 591f1f8b00c0eb6b24da2646904aabaf9ee6e6dcc735cf533bb4c1ccdf9e1f60

(this sample)

Cape
Cape
https://www.capesandbox.com/analysis/195151/
  
URLhaus
https://urlhaus.abuse.ch/url/1655905/
  
Delivery method
Distributed via web download

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